Chapter 1
Preparation — Precautions for use
22 - ENGLISH
Cautions on use
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To get a good picture quality
In order to view a beautiful image in higher contrast, prepare an appropriate environment. Draw curtains or blinds
over windows and turn off any lights near the screen to prevent outside light or light from indoor lamps from
shining onto the screen.
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Do not touch the surface of the projection lens with your bare hands.
If the surface of the projection lens becomes dirty from fingerprints or anything else, this will be magnified and
projected onto the screen.
Attach the supplied lens cover to the optional projection lens when not using the projector.
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DLP chips
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The DLP chips are precision-made. Note that in rare cases, pixels of high precision could be missing or always
lit. Such a phenomenon does not indicate malfunction.
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Directing a high-power laser beam onto the projection lens surface can damage the DLP chips.
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Do not move the projector or subject it to vibration or impact while it is operating.
Doing so may shorten the life of the built-in motor.
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Lamp
The light source of the projector is a high-pressure mercury lamp.
A high-pressure mercury lamp has the following characteristics.
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The luminance of the lamp will decrease by duration of usage.
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The lamp may burst with a loud sound or have its service life shortened because of shock, chipping, or
degradation due to cumulative runtime.
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The lamp life varies greatly depending on individual differences and usage conditions. In particular, frequent on/
off switching of the power greatly deteriorate the lamp and affects the lamp life.
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Continuous use for over one week will deteriorate the lamp. The degradation of the lamp due to continuous use
can be reduced by using the [PROJECTOR SETUP] menu
→
[LAMP RELAY].
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In rare cases, the lamps burst shortly after projection starts.
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The risk of bursting increases when the lamp is used beyond its replacement cycle. Make sure to replace the
lamp unit regularly.
(“When to replace the lamp unit” (
x
page 184), “How to replace the lamp unit” (
x
page 184))
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If the lamp bursts, gas contained inside of the lamp is released in the form of smoke.
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It is recommended that you store the replacement lamp unit as a contingency.
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Computer and external device connections
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When connecting a computer or an external device, read this manual carefully regarding the use of power cords
and shielded cables as well.
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Viewing 3D images
(Only for PT-DZ21K2, PT-DS20K2)
The projector can display the 3D video signal input in various formats such as “frame packing”, “side by side”, etc.
You are required to prepare external devices for viewing 3D images (such as 3D eyewear, video signal output
devices) which are suitable for your 3D system. Connections of the projector and external devices vary depends
on the 3D system to be used, see the operating instructions of external devices you use.
Refer to “List of 3D compatible signals” (
x
page 212) for the types of 3D video signals that can be used with the
projector.
